Radio receiving set and cabinet therefor



June 6 1950 L. J. GRIFFIN RADIO RECEIVING SET AND CABINET THEREFOR 2 She ets-Sheet 1 Filed Nov. 29, 1947 INVENTOR LAURENCE u. GIKIFFl/V BY ATTORNEY L. J. GRIFFIN RADIO RECEIVING SIT AND CABINET THEREFOR June 6, 1950 2 Sheets-Sheet 2 Filed Nov. 29, 1947 0 11 "5% n NW a 55% \Ill I. 55 i INVENTOR LAURENCE d. GRIFFIN ATTORNEY Patented June 6, 1950 UNITED TAT ES PATENT 2,510,103 RADIO "RECEIVING" SET AND CABINET THEREFOR Laurence'James Griffin, Sidcup, Kent, :England, assignor, to International Standard Electric Corporation, N'ew'York, N. Y.,

Delaware a corporation of A pplicationNovember 29, 1947, Serialz-Np. 788 9.08 .ln-iGreat Britain December 6, 1946 11 Claims.

Thepresentinvention relates to radio receivers and to cabinets therefor and particularly to cabinets of the type which are constructed of moulded plastic material or of ';pressed metal.

.Large numbersof radio receivers of any one nents. Furthermore, it is desirable that the operation of assembly :of the various components should be as simple and rapid: as possible.

According to one" feature the invention provides a radio receiver comprising incombination a self contained chassis portion carrying the components of the receiver including a loud speaker and tuning controls and connections, two identically shaped cabinetgportions adapted to enclose said chassis portion,.each of said cabinet portions comprising sound louvres or apertures for the loud speaker, an aperture or apertures for giving access to the tuning controls and connections, and projections ;nthe chassis portion for engagement between ithe meeting iedges cf the cabinet portions. y

.According to :another feature the invention comprises .a cabinetiorradio receivers formed of .two identicallyxshapedamouldedor :,pressed half cabinelts fittingitogether. V

Theireceiver chassis maybe clamped in position within ithe cabinet by means of .bearing surfaces in: the moulded-.01 pressed half-cabinets which close firmlylovemand incontact with, ,projecting portions of the chassis when the two halves of the cabinet-.areheld:together.

Anadvantagerofzformlngtthe cabinet of two iidentieallyshaped;mouldingszor 'pressings'is that only one'toolis required for producin the whole cabinet and furthermore thatzonly vhalf thecabimet is .made at pnermoeration. Thus the tool is smaller :in size ;:andt.simpler in construction :and 'in use than in-the normal manner of construction --wherebythe whole"cabinetexcept'for aback cover isLmad'e in i'oneoperation.

i lnother"advanta'ge of thisinyention is thatit provides J= simple and rapid ameans 'i-of installing .theicomplete chassis wlthin thetcabinet and of retaining itsinfposition' without theiuse of screws, lbo'lts'orslmilar fiXing devlcesattached to, or pass- -ing?through, any portion of tthe chassis itself.

The chassis .can:therefore:be removed from the -.cabinetxwith tgreait ease': should zany adjustment lor repairzbecomenecessary.

.The invention will he :better :understood from the following description o! one embodiment" which should be read in conjunction with the drawings accompanying the specification, in which:

'Fig. 1 shows an exploded perspective view of one form ofradiojreceiver according to thisinvention including a typical chassis and two identically shaped. oabihet.portions,,

Fig. 2 shows a front elevation of the cabinet, the rear elevation being identical,

vFig. 3 shows apart .section through. on. Figure 2.

, In Fig. 1 references I. aridlZ are identical moulded or .pressed. hollow half-cabinets which can. be fitted together withoutoverlap was to abut along their plane edges 3, shown in the half-cabinet l.

Pegshaped projections i lan'dholes 5 are provided as integral parts of the half-cabinets and when the two half-cabinetsare pressed together with their plane edge surfa'ces3 incontact, the pegs 4 fi-t'into the holes 5 thus preventing any lateral movement ,of the half -cabinets with respect to one another.

Holes 6 are also provided in suitable flange like portions 1 of the half-cabinets and when the two half-cabinets are closed together to form a complete cabinet bolts 8 are passed through the corresponding holes 6 in the two half-cabinets and nuts 9 are screwed .ontothe said bolts and tightened up to hold the. two half-cabinets together.

It is to be understood that if it is found desirable further holesmaybe provided in suitable positions in the half-cabinets to enable further bolts and 'nuts to be employed for holding the two half-cabinets together, or other means might be adopted such as a metal bandpassing around the two half-cab ts and-having its ends suitably fastened toget er.

When the two half-cabinets are closed tonne x-i':

,gether the joint where the surfaces 3am in contact would be visible.

For appearances sake rebates II] are provided adjacent to the surfaces (rand a fillet ll of rubber or othersuitable material is fitted into said rebates. This fillet may be coloured as desired .for (decorative purposes.

In order to allow access to'the control knobs and tuning scale of 'the receiver, and to provide means of connecting the earth andantenna'and power supply to the "receiver, suitably shaped apertures are provided in the half-cabinets.

These apertures l2 arexshown in'Figs. 1 and :2

as'rectangular windows" but they can be made of any othervsuita'ble shape.

- For the purpose-cf showing howtthe .chass'isis fitted into the cabinet a completely assembled receiver chassis I3 is shown in Fig. 1. Details of the actual receiver and chassis are only described where they affect the mode of mounting the chassis within the cabinet.

On the front of the chassis 13 there is fixed a plate I4 behind which is mounted a cone loud speaker, the open end of which cone is attached to the back of said plate by means of screws l5. A portion l6, shown as part of a circle, is cut out from the plate l4 so that the plate forms the usual baflle for the cone loud speaker; In front of plate l3 there is mounted a rectangular panel I! carrying any necessary control knobs such as those shown at l8 and I9 and a scale 20 on which the wave length to which the receiver is tuned is indi-.

cated in known manner.

The length and width of the rectangular panel l1 are slightly greater than the corresponding dimensions of the window aperture l2 and panel I1 is so positioned on the chassis that when the complete chassis, carrying with it said panel, is pressed forward into the front half-cabinet l the said panel registers with the window aperture l2 and a small margin around the edge of the front surface of panel I! rests against a specially provided flat portion of the inner surface of the front halfcabinet I immediately surrounding the window aperture l2. v

This flat surface can be seen at 2| in rear half-cabinet 2. When therefore the complete chassis is pressed forward into the front halfcabinet the controls l8 and I9 will project through the aperture l2 and the tuning scale 20 will be visible. The cut out portion IS in plate I4 will be close to the upper part of the inner surface of the front half-cabinet I.

Referring now to Figs. '2 and 3 it can be seen that apertures 22 are provided in the half-cabinets under the louvres 23. These apertures allow the sound waves produced by the loud speaker to pass freely out of the cabinet in all directions and also serve to provide ventilation for the interior of the cabinet.

Turning again to Fig. 1 it can be seen that a panel 24, which isof substantially the same length and width as panel I! is mounted on the rear of the chassis l3 and this panel is so positioned that when the complete chassis is pressed backward into the rear half-cabinet 2 the panel 24 will register with the window aperture l2, and a small margin aroundfthe edge of the rear surface of the panel 24 will rest against the flat surface H in the rear half-cabinet. The panel 24 serves to carry suitable means of making connections between the receiver and leads connecting to an antenna, to earth and to a source of power supply. Thus there are shown an antenna connection 25, an earth connection 26 and a power supply connection 21 all of which can be connected to panel 24 by means of plugs and sockets or in any known way.

It will be seen that as shown in Fig. l the plate 14 and the panels I! and 24 do not lie in planes which are perpendicular to'the plane of the base 28 of the half-cabinets. For appearance sake it is desirable to make the exterior surfaces of the complete cabinet slope slightly inwards from the base towards the topand the angle of mounting of the said plate and said panels is selected to conform to the angle of slope adopted for the front and rear of the cabinet.

It can be seen that provided the distances between points on the outer surfaces of panels I1 and, 24 respectively are equal to the distances between corresponding points on the flat surfaces 2| in the two half-cabinets the chassis will be locked in position when the two halves of the cabinet are closed over it and the bolts and nuts 8 and 9 are in position and tightened up. In order to ensure that the chassis is firmly held in position within the cabinet however it will usually be found preferable to provide some means of clamping it in position associated with the main body of the chassis rather than to depend on panels I! and 24 which then need only be fairly lightly attached to the chassis. One such means is illustrated in Fig. 1. On the end plate 29 of the chassis a lug 30 projecting at right angles to said end plate is provided. This lug can be provided by welding or riveting an angle piece to the end plate 29 or as illustrated by cutting the metal of the end plate along one long and two short sides of a rectangle 3| and pressing the partially cut out rectangle of metal outwards through a right angle along the uncut side of said rectangle.

A similar lug (not shown) is provided at the far end of the chassis. Within the half-cabinets there are provided fins 32 integral with the body of the cabinet, terminating in flat end surfaces 33 is perpendicular to the plane of the base 28 of the half-cabinets. The flat end surfaces 33 are slightly set in from the plane edges 3 of the halfcabinets. When the half-cabinets are closed together over the complete chassis the lugs 38 are held between the flat end surfaces 33 of the two half-cabinets, the lugs at both ends of the chassis being so held. Thus the chassis is firmly clamped in position when the two half-cabinets are held together by the bolts and nuts 8 and 9.

In order to allow some manufacturing tolerance in the various dimensions and to ensure that the lugs 36 are firmly gripped between the fiat bearing surfaces 33 said lugs are preferably covered with a padding 34 of resilient material such as rubber or felt.

Although in the embodiment described herein the means provided for holding the chassis in position consists of lugs on the end plates of the chassis clamped between suitable bearing surfaces provided in the half-cabinets, bearing surfaces in the half-cabinets might be provided to clamp lugs or projections on the chassis of a different shape from that described and illustrated and differently positioned on the chassis. Furthermore bearing surfaces can be provided in the half-cabinets to bear on portions of the chassis not specially provided for the purpose. Padding such as that shown at 34 can be provided on any parts of the chassis which are intended to be held by bearing surfaces provided in the half-cabinets or such padding could be attached to the bearing surfaces in the half-cabinets.

What we claim is:

1. A radio receiver comprising in combination a self contained chassis portion carrying the components of the receiver including a loud speaker and tuning controls and connections, two identically shaped cabinet portions comprising meet ing edges and adapted to'enclose said chassis portion, each of said cabinet portions comprising sound louvres or apertures for the loud speakers, an aperture or apertures for giving access to the tuning controls and connections, and projections on the chassis portion for locking'engagement between the meeting edges of .the cabinet portions.

2. A radio receiver according to claim 1 in which said chassis is provided with panels on two opposite sides for alignment with said apertures in said cabinet positions.

3. A cabinet for radio receiver chassis having projecting portions and formed of two identically shaped hollow moulded or pressed half-cabinets fitting together means for clamping the receiver chassis in position within the cabinet comprising claim-4 in which the said pegs and holes are formed in the moulding or pressing of said halfcabinets.

6. A cabinet for radio receivers according to claim 5 in which the two half-cabinets are fastened together by means of nuts and bolts the holes "for said bolts being formed in the moulding or pressing of said half-cabinets.

7. A cabinet for radio receivers according to claim 3 in which a suitable padding material such as rubber or felt is provided between said bearing surfaces and said projecting portions.

8. A cabinet for radio receivers according to claim 3 in which said projecting portions are lugs standing out at right angles from the end plates of the receiver chassis.

9. A cabinet for radio receivers according to 6 claim 3 in which apertures are provided in the half cabinets to permit of access to the controls of the receiver and to the tuning scale and. to permit of connections being made between the receiver and the antenna and earth leads and the power supply.

10. A cabinet for radio receivers according to claim 9 in which apertures are provided in the form of louvres topermit acoustic waves to pass out from the cabinet and to allow for ventilation of the interior of the cabinet.

11. An arrangement according to claim 3, in

which said projecting portions comprise lugs standing out at right angles from the end plates of the receiver chassis, said half cabinets comprising parallel spaced interior fins between which said lugs ride upon closing together said half cabinets.

LAURENCE JAMES GRIFFIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 188,566 Barnes Mar. 20, 1877 1,565,993 Fitzpatrick Dec. 15, 1925 2,158,641 Stenberg May 16, 1939 2,237,886 McDonald, Jr. et al. Apr. 8, 1941 FOREIGN PATENTS Number Country Date 784,094 France Apr. 23, 1935 

